Gasconade County Courthouse

Historical marker location:

119 East 1st Street, Hermann, Missouri

( Marker is on East 1st Street (State Highway 100) 0.1 miles east of Market Street, on the right when traveling west.)

The town of Bonne Terre, Missouri, has the largest underground lake in the United States. The Bonne Terre Mine was once one of the world's largest lead mines, but is now a popular scuba diving destination.